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44b81d0e43
FLinearColor ctor from FColor is mainly three table lookups, make it inline and move to the header. Quantize, QuantizeFloor, QuantizeRound are similarly trivial, now inline. Move Clamp01 to FColor as static method so it's namespaced; rename to Clamp01NansTo0 to explain why it's not just FMath::Clamp to [0,1] SSE2-ified FLinearColor::ToFColorSRGB for x86 targets, bitwise exact same results as before for all input floats (tested exhaustively, test included) Don't want to make ToFColorSRGB inline, it's a bit large for that, but make an array version that does multiple at once. Mainly try to avoid doing a cross-DLL call per pixel for large batches. Switch ImageCore Linear->sRGB conv to use array version. FLinearColor R,G,B,A members union'd with "deprecated" RGBA[] array, Component() updated to use it (matching recent fix for FVector) ImageCore vector loads from FLinearColors updated to use &Component(0) which gives &RGBA[0], pointer to a 4-elem array Add tests to UnrealMathTest.cpp to verify that sRGB<->Linear and UNORM<->Linear conversions behave as expected, plus the separate ColorConversionHeavy test that does the exhaustive equivalence check between the SSE2 ToFColorSRGB() and reference (warning: takes a while) #rb danny.couture, martins.mozeiko #preflight 6238c86f04769ab493469a3f [CL 19456245 by fabian giesen in ue5-main branch]